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이수남(Sunam Lee),조병철(Byungcheol Cho),조진호(Jinho Jo),유종남(Jongnam You) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
A new fiber molding process technologies are developed to improve the acoustic performance and control the partial area density of the vehicle sound insulation parts such as dash isolation pad and floor carpet pad. The fiber injection process makes it possible to fill the mold with fiber directly using the air-blowing machine and deform the final insulation part having the better fitting to the body panels. This paper shows that the better acoustic performance and the lower weight of the sound insulation parts can be achieved through the new fiber injection process, compared with the conventional product based on the felt molding or PU(polyurethane) molding process.
이수남(Sunam Lee),조병철(Byungcheol Cho),정선경(Sunkyoung Jeoung),이평찬(Pyoungchan Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The function of headlining is to raise merchantable quality and comport to by making interior view of automotive more graceful. Preventing damage to the passenger’s head in the event of car crash could be another function of it. Moreover, it has NVH performances that decrease noise and vibration due to the rain and wind from roof and also increase quietness by absorbing noise in the car. In this study, sound-absorbing materials using melt-blown nonwoven and needle-punched nonwoven to achieve the high sound absorption performance, and then evaluated to meet a requirement for the automotive component. The test results showed that the acoustic performances of developed products having new laminated structure were better than those of the conventional product.
루프가 형성된 부직포를 이용한 차량용 고흡음성 헤드라이닝
이수남(Sunam Lee),이원구(Wonku Lee),조병철(Byungcheol Cho),조윤진(Younjin Cho) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The function of headlining is to raise merchantable quality and comport to by making interior view of automotive more graceful. Preventing damage to the passenger"s head in the event of car crash could be another function of it. Materials of which targets are light weight, high performance, luxury and eco-friendliness have been developed recently. In this study, needle-punched nonwovens which consist of polypropylene fibers and glass fibers were produced by needle-punching process, and then a composite nonwoven of 3D structure was prepared by two looped nonwoven which were made of needle-punched nonwovens by loop-punching process. The absorption coefficient test result showed that the acoustic performance of a developed product having bulky structure was better than those of the conventional product and the durability test result showed that the deformation of a developed product did not occur after environment test.